Copying a floppy disk in ASM

ruud.baltissen_at_apg.nl
Date: 2008-07-10 09:24:47

Hallo allemaal,
 
 
I received quite a number of 8050 disks with a lot of software
(unfortunately for the major part of you, most of it is in Dutch).
Anyway I want to make D80 and D82 images of them. Some years ago I
developed a tool to copy disks so I could diskcopy some WordCraft disks
for Marko. Problem: although partly in ASM, it is still slow. I know it
can be done much quicker, just look at Star Commander with parallel
cable or my CBM-HD project, version 4. I already found out that an own
fast communication between the PC and the 8250 drive over the IEEE cable
is no problem at all. 
 
My problem is that I have no idea how to tell a 8250 drive what sector
to load in ML. I know how to do it with a 1541, so the only thing I need
is that someone tells me what RAM locations I have to use with a 8250.
But a 8250 has two drives, how can I tell the 8250 what drive to use?
Some ASM examples would be great! 
 
Thanks in advance!
 
 
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